No panic, I’ll be chipping away it can always be added to later.
I couldn’t be encouraging people away from Farmier, I’m sure farmOS could do with all available income streams 
But if it’s just Node-Red you are tinkering with then self-hosted wouldn’t have much advantage, different story though if you wanted to get deeper into custom modules. Or the idea of a local self-hosted instance synchronized to a hosted instance was discussed briefly here: Internet-accessible Local-first farmOS hosting - #6 by walt
You could probably achieve it with Node-Red too.
Of course a self-hosted instance for trying new things out is very useful too.